1 #include <linux/virtio_byteorder.h>
2 #include <linux/virtio.h>
3 #include <uapi/linux/virtio_config.h>
6 * __virtio_test_bit - helper to test feature bits. For use by transports.
7 * Devices should normally use virtio_has_feature,
8 * which includes more checks.
10 * @fbit: the feature bit
12 static inline bool __virtio_test_bit(const struct virtio_device
*vdev
,
15 return vdev
->features
& (1ULL << fbit
);
19 * __virtio_set_bit - helper to set feature bits. For use by transports.
21 * @fbit: the feature bit
23 static inline void __virtio_set_bit(struct virtio_device
*vdev
,
26 vdev
->features
|= (1ULL << fbit
);
30 * __virtio_clear_bit - helper to clear feature bits. For use by transports.
32 * @fbit: the feature bit
34 static inline void __virtio_clear_bit(struct virtio_device
*vdev
,
37 vdev
->features
&= ~(1ULL << fbit
);
40 #define virtio_has_feature(dev, feature) \
41 (__virtio_test_bit((dev), feature))
43 static inline bool virtio_is_little_endian(struct virtio_device
*vdev
)
45 return virtio_has_feature(vdev
, VIRTIO_F_VERSION_1
) ||
46 virtio_legacy_is_little_endian();
49 /* Memory accessors */
50 static inline u16
virtio16_to_cpu(struct virtio_device
*vdev
, __virtio16 val
)
52 return __virtio16_to_cpu(virtio_is_little_endian(vdev
), val
);
55 static inline __virtio16
cpu_to_virtio16(struct virtio_device
*vdev
, u16 val
)
57 return __cpu_to_virtio16(virtio_is_little_endian(vdev
), val
);
60 static inline u32
virtio32_to_cpu(struct virtio_device
*vdev
, __virtio32 val
)
62 return __virtio32_to_cpu(virtio_is_little_endian(vdev
), val
);
65 static inline __virtio32
cpu_to_virtio32(struct virtio_device
*vdev
, u32 val
)
67 return __cpu_to_virtio32(virtio_is_little_endian(vdev
), val
);
70 static inline u64
virtio64_to_cpu(struct virtio_device
*vdev
, __virtio64 val
)
72 return __virtio64_to_cpu(virtio_is_little_endian(vdev
), val
);
75 static inline __virtio64
cpu_to_virtio64(struct virtio_device
*vdev
, u64 val
)
77 return __cpu_to_virtio64(virtio_is_little_endian(vdev
), val
);
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